Tree (unittests)

- Added missing assertions

source/niknaks/containers.d

@@ -747,6 +747,11 @@ unittest
 
     string[] result = treeOfStrings.dfs(strat, touch);
     writeln("dfs: ", result);
+
+    assert(result[0] == "1");
+    assert(result[1] == "2");
+    assert(result[2] == "3");
+    assert(result[3] == "Top");
 }
 
 public class VisitationTree(T) : Tree!(T)
@@ -797,6 +802,10 @@ unittest
     root.appendNode(thing);
     thing.appendNode(root);
 
-    writeln(root.linearize());
+    string[] linearized = root.linearize();
+    writeln(linearized);
+
+    assert(linearized[0] == "subtree");
+    assert(linearized[1] == "root");
 
 }